can I count on my compiler to optimize strlen on const char *?

Question

In my SAX xml parsing callback (XCode 4, LLVM), I am doing a lot of calls to this type of code:

static const char* kFoo = \"Bar\";

void SaxCallBack(char* sa         


        

Answer 1

In general you can't count on it. However, you could use 'sizeof' and apply it to a string literal. Of course, this mean that you can't define 'kFoo' the way it originally was defined.

The following should work on all compilers and on all optimization levels.

#define kFoo "..."

    ... strcmp(... sizeof(kFoo))